ALLOY 625 Bar

Alternative and trade names
ALLOY 625, UNS N06625
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Description

Alloy 625 is a nickel-chromium-molybdenum alloy with additional of niobium. This provides a high strength alloy without a strengthening heat treatment. Service temperatures range from cryogenic to about 1000°C. High tensile, creep, and rupture strength together with outstanding fatigue and thermal-fatigue strength in addition to oxidation resistance and excellent weldability are characteristics of this alloy.

Related Standards

Equivalent Materials

This material data has been provided by Sverdrup Steel.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

Dimension

PropertyValue

Diameter

12.7 - 350 mm

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Mechanical

PropertyTemperatureValue

Charpy impact energy, V-notch

-10.0 °C

46 J

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Elongation

23.0 °C

25 %

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Hardness, Rockwell C

23.0 °C

287 [-]

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Tensile strength

23.0 °C

770 MPa

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Yield strength Rp0.2

23.0 °C

350 MPa

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Chemical properties

PropertyValueComment

Carbon

0.1 %

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Chromium

20 - 23 %

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Cobalt

1 %

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Iron

5 %

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Manganese

0.5 %

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Molybdenum

8 - 10 %

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Nickel

58 %

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Other

3.15 - 4.15 %

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Nb+Ta

Phosphorus

0.02 %

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Silicon

0.5 %

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Sulfur

0.015 %

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Technological properties

Property
Application areas

Alloy 625 is used in oil gas industry, marine engineering, chemical processing and pollution control equipment.

Corrosion properties

The alloy is especially resistant to pitting and crevice corrosion but also other severely corrosive environments.

Heat Treatment

Solution Annealed at 890 to 1080°C.

Welding

Excellent